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Water Hardness in Milton, WI

Wisconsin · 1 zip codes · 4 matched water systems

300 PPM
17.5 GPG
Very Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 299 PPM

Dataset updated March 9, 20264 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
Janesville Water Utility
WI1540127
Water source: groundwater
Serves: 64,415
USGS environmental estimate: 273 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 4 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
2 verified treated-water sources
4 matched systems total for this city; treated-water reports are prioritized when available.
Water source profile
Primarily groundwater
Groundwater commonly picks up calcium and magnesium after contact with rock and soil. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Milton

These systems are matched to Milton, WI. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

4 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Janesville Water Utility
WI1540127
Very Hard
300 PPMgroundwater64,415 servedVerified — Annual Water Quality Report
Source water: 273 PPM
Beloit City Of
WI1540112
Very Hard
300 PPMgroundwater36,677 servedVerified — Annual Water Quality Report
Source water: 273 PPM
Milton Waterworks
WI1540130
Very Hard
273 PPMgroundwater5,588 servedEstimated — Nearby Data
Fulton Utility District
WI1541223
Very Hard
273 PPMgroundwater200 servedEstimated — Nearby Data

Zip Codes in Milton, WI

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Very Hard Water - Treatment Strongly Recommended

Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.

Recommended Products

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | How to Test Your Water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Milton, WI.

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Frequently Asked Questions

How hard is the water in Milton, WI?

The citywide weighted average water hardness in Milton, WI is 299 PPM (17.5 GPG), classified as very hard. This is based on 4 matched water systems. The gauge highlights Janesville Water Utility, a verified treated-water system, because individual systems can differ from the citywide average.

Do I need a water softener in Milton, WI?

With a citywide average hardness of 299 PPM, a water softener is recommended for homes in Milton. Confirm your tap reading before sizing equipment.

Is hard water in Milton, WI safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Milton, WI?

Milton, Wisconsin is served by 4 matched water systems across 1 zip code.

Learn More About Your Water